WAV files - One Type Plays, One Does NotGeneral

I use a VOIP service for my business lines. When someone leaves a message, I get an email with a .wav file attachment. My voice messages are not playing, when trying to open the attachment, I get error "Sorry, the player does not support this type of audio file."

Here it gets weird, I changed my account settings (something unrelated) and got an automated message from my company in the same .wav attachment. It was able to play fine. So I looked at the advanced options of each file and they were different, although both .wav files.